package com.dlc.modules.qd.utils;

import java.security.MessageDigest;


/**
 * @Package com.dlc.modules.qd.utils
 * @Description: MD5Util
 * @Copyright: Copyright (c) 2017
 * Author tangxs
 * @date 2017/12/14 10:31
 * version V1.0.0
 */
public class MD5Util {

        private static String byteArrayToHexString(byte b[]) {
                StringBuffer resultSb = new StringBuffer();
                for (int i = 0; i < b.length; i++)
                        resultSb.append(byteToHexString(b[i]));

                return resultSb.toString();
        }

        private static String byteToHexString(byte b) {
                int n = b;
                if (n < 0)
                        n += 256;
                int d1 = n / 16;
                int d2 = n % 16;
                return hexDigits[d1] + hexDigits[d2];
        }

        public static String MD5Encode(String origin, String charsetname) {
                String resultString = null;
                try {
                        resultString = new String(origin);
                        MessageDigest md = MessageDigest.getInstance("MD5");
                        if (charsetname == null || "".equals(charsetname))
                                resultString = byteArrayToHexString(md.digest(resultString
                                                .getBytes()));
                        else
                                resultString = byteArrayToHexString(md.digest(resultString
                                                .getBytes(charsetname)));
                } catch (Exception exception) {

                }
                return resultString;
        }

        private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
                        "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

}
